SonarQube help needed (complex custom rule creation)

We want to implement a SonarQube rule to block the build if the database was called inside a for-loop/iteration
In the following code, we want to create a custom rule (complex) to fail if any EmployeeDao method was called inside a for-loop/iteration:

    class OrganizationService {

        @Inject
        private EmployeeService employeeService;

        public void doSomeLogic() {
            List<Employee> employeeList = employeeService.getEmployees();
            /*
            ... some logic here
             */
            employeeList.forEach(employee -> employeeService.updateEmployee(employee));
        }
    }
    class EmployeeService {

        @Inject
        private EmployeeDao employeeDao;

        public List<Employee> getEmployees() {
            return null;
        }

        public void updateEmployee(Employee employee) {
            employeeDao.update(employee);
        }
    }
    class EmployeeDao {
        public void update(Employee employee) {
        }
    }
    class Employee { }

We want sonar to fail for this line:

    employeeList.forEach(employee -> employeeService.updateEmployee(employee));

Is this a valid approach? or sonar is not the correct tool in our situation?